/*****************************************************************************
 * Copyright (c) 2007, Ping Identity
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Ping Identity, nor the names of its contributors
 *       may be used to endorse or promote products derived from this software
 *       without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY PING IDENTITY ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
 * NO EVENT SHALL PING IDENTITY BE LIABLE FOR ANY DIRECT, INDIRECT, 
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *****************************************************************************/

#include "infocard.h"
#include "config.h"

#include <string.h>
#include <openssl/ssl.h>
#include <libxml/tree.h>
#include <xmlsec/xmlsec.h>
#include <xmlsec/crypto.h>

bool ic_init()
{
	SSL_load_error_strings();
	SSL_library_init();
	/* NOTE: assuming PRNG is seeded automatically */
	
    xmlInitParser();
    LIBXML_TEST_VERSION
    xmlLoadExtDtdDefaultValue = XML_SKIP_IDS;
    xmlSubstituteEntitiesDefault(0);
	
    /* Init xmlsec library */
    if(xmlSecInit() < 0) {
		fprintf(stderr, "Error: xmlsec initialization failed.\n");
		return false;
    }
	
    /* Check loaded library version */
    if(xmlSecCheckVersion() != 1) {
		fprintf(stderr, "Error: loaded xmlsec library version is not compatible.\n");
		return false;
    }    
	
    /* Load default crypto engine if we are supporting dynamic
     * loading for xmlsec-crypto libraries. Use the crypto library
     * name ("openssl", "nss", etc.) to load corresponding 
     * xmlsec-crypto library.
     */
#ifdef XMLSEC_CRYPTO_DYNAMIC_LOADING
    if(xmlSecCryptoDLLoadLibrary(BAD_CAST XMLSEC_CRYPTO) < 0) {
		fprintf(stderr, "Error: unable to load default xmlsec-crypto library. Make sure\n"
				"that you have it installed and check shared libraries path\n"
				"(LD_LIBRARY_PATH) envornment variable.\n");
		return false;	
    }
#endif /* XMLSEC_CRYPTO_DYNAMIC_LOADING */
	
    /* Init crypto library */
    if(xmlSecCryptoAppInit(NULL) < 0) {
		fprintf(stderr, "Error: crypto initialization failed.\n");
		return false;
    }
	
    /* Init xmlsec-crypto library */
    if(xmlSecCryptoInit() < 0) {
		fprintf(stderr, "Error: xmlsec-crypto initialization failed.\n");
		return false;
    }
    return true;
}
void ic_free()
{
	/* Shutdown xmlsec-crypto library */
    xmlSecCryptoShutdown();
    
    /* Shutdown crypto library */
    xmlSecCryptoAppShutdown();
    
    /* Shutdown xmlsec library */
    xmlSecShutdown();
	
    /* Shutdown libxslt/libxml */
    xmlCleanupParser();	
}
